How does population grow?
So we already know that the prestige of your cities attracts people out of the wilderness and bolsters your population. What I'm wondering though, is what roll standard population growth takes place... you know, via the old fashion way. Once there are metropolises sprinkled across the landscape, shouldn't we expect that there simply no appreciable amount of people left wandering the wilderness? And if this is still the main means of gaining citizens, doesn't it kinda make the big bad wilderness not all that big and bad anymore (hey, it can't be that bad if millions of people are out there getting along just fine)? Not to mention, whatever happened during the Apocalypse must have been pitifully tame. And if there are so many people out in the countryside, then I would very much expect to see them all over the place when I send my units out adventuring.
What would make the most sense is if population growth in the first 5th or 10th segment of the game time line relies heavily on immigration from the wilderness--- a sort of regathering of civilization. After this point, it seems reasonable to make population growth contingent on fertility. Prestige could still play a role, perhaps, in attracting immigrants away from opponents or from smaller cities that don't have the industry to support local population growth.